Asymmetrical button insert for rock drilling



FIG. 1 is a right side view of an asymmetrical button insert for rockdrilling showing our new design;

FIG. 2 is a side view of the asymmetrical button insert for rockdrilling taken at 90° to the view of FIG. 1;

FIG. 3 is a front end view of the asymmetrical button insert for rockdrilling;

FIG. 4 is a perspective view, taken from the right side and slightlyabove, of the asymmetrical button insert for rock drilling; and,

FIG. 5 is a perspective view showing the opposite side of theasymmetrical button insert for rock drilling shown in FIG. 4.

The ornamental design for an asymmetrical button insert for rockdrilling, as shown.